package homework.jdbc.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * Created by Administrator on 2017/9/13.
 */
 public class JDBCUtils {
     //很多方法要用同一变量 将他变成成员变量
    //连接为成员变量
    private static Connection conn=null;//将变量定义在外面！！
    public static Connection getConnection(){
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn= DriverManager.getConnection("jdbc:mysql://localhost:3307/jdbc","root","123456");
            return conn;
        } catch (Exception e) {
            e.printStackTrace();
        }
      return null;
    }
    public static void close(){
        try {
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
